Friction shock-absorbing mechanism



1. F. ocoNNoR.

FRICTION SHOCK ABSORBING MECHANISM.

APPLICATION FILED APILZU, 1920.

Patented Sept. 319,

ww @Si *E w N UKN Patented sept. is, ieaa 'JOE-N'Ff OCONNOR, OFCHICAGO, ILLINOIS, 'ASSGNOR TO VJILLIAIVI H. MNER, 0F CEAZY, NEW' YORK.

-FRICTION SHOCI-ABSORBING MECHANISM.

Application filed April 26, 1920. Serial No. 376,495.

VT0 all whom t 'may concern:

tBe' it known that I, Joran FOCONNOR, a ycitizen of United States, residing at Chicago, in-the county of Cook and State of illinois,

haveinvented a certain new and useful im! `provenient in Friction Shock-Absorbing Mechanism,'of which the following is a full, clear, concise, and exact description, `reference being had to the accompanying drawings, forming ya part of this specification.

rThis invention relates to improvements in lfriction shock absorbing mechanism.

The object of theinvention is to provide anefficientjhigh capacity friction shock absorbing mechanism having a large number of 'friction wearing surfaces and wherein Ithe expense of renewal or repair of those parts subjected'to thegreatest wear, is reduced to ya minimum.

`More specifieally'the object of the inven tionis toprovide al friction shock absorbing mechanism, wherein is employed, among :other elements, laterally movable friction vshoes which -are formed of a multiple of .parts so that, those parts subjected to the 'greatest wear, .may 'be renewed without necessitating Arenewalof the entire friction shoe.

Other objects of the invention will more clearly appear from the description hereinafter following.

In the drawing forming a part of this specification, Figure'l is ahoriZontal longi- Vtudinal sectionalview of a portion of a railway draft rigging showing my improve` ments in'connectiontherewith. Figure 2 is a vertical transverse sectional view taken substantially on the line 2 2 of Figure 1. Figure 3 is a side elevation of the improved shock absorbing mechanism proper; and Figure i is a plan view of one of the parts entering into the make-up of the laterally movable friction shoes.

In vsaid drawing, 10-10 denote channel shaped center or draft sills of a railway car, to the inner faces of which are secured front lugs 11 and rear lugs 12. A portion of a drawbar shank is indicated at 13, the same having attached thereto a U-shaped yoke strap 14 of well known form. All of the parts may be supported by a detachable saddle plate 15.

The improved shock absorbing mechanism proper, as shown, comprises, broadly, a cast` ing A having` friction shells at each end thereof; four combined friction shoes and wedges B; a transverselyextending spring C; and friction shoes designated generally by the reference D.

The casting A is of substantially hollow rectangular box-like form and has upper and lower walls 16-16 and sidewalls 17-17. At each end, the casting A is formed as a friction shell with opposed longitudinally extending friction surfaces 18-18. Each side wall of the casting A is cut away or recessed as indicated at 19'to accommodate portions of the laterally movable friction shoes, as hereinafter described.

Each of the combined wedge-shoes B is formedwith a half follower 20, a longitudinally extending friction surface 11S on its outer side and an inclined friction wedge surface 21. Each member 'B is also formed with an outwardly facing shoulder 22 adapt ed to cooperate with a corresponding flange or shoulder 23 on the casting i to limit the outward movement of the wedge-shoes B withrespect to the friction shells, as will be understood. The inward movement of the wedge-slices B with respect to the friction. shells is limited by engagement with the follower 2O at the ends of the casting A, as Vwill be evident from an inspection of Figure 1.

The laterally movable friction shoes D are two in number and of like construction. Each of said shoes'D comprises Ythree elements, namely, a single springv cap or follower 24 and two like end friction shoes proper 25-25- The spring caps or followers 24 are of hollow cylindrical cup-like form and at their inner'edges are provided with laterally extended flanges 26, the flanges 26 having arcuate outer edges 27 and end edgesv 28--28 extending parallel to the side walls 17, as shown in Figure 3. Each of the friction shoes proper 25, as shown in Figure e, is formed with an outer inclined friction wedge surface 121, to cooperate with a corresponding surface 21, and with an outwardly extended arcuate flange 29 arranged to snugly fit the cap- 24 and extend into the recess 19. At their inner ends, the members 25 are provided with arcuate rabbets 30 to accommodate the iianges 26 so as to bring the inner face of the cap 24 Hush with the inner longitudinally extending faces 31 of the member 25. The parts are also preferably designed so that the shoes I) will come into contactl with each other simultaneously with the engagement of the follower sections 20 with the ends of thecasting A.

Withl the construction shown, it is evident that those parts B and 25 which are sub-l nism, the combination with a friction shell having interior friction' surfaces and provided with opposed arcuate openings; of combined friction shoes and wedges cooper- .able with said friction surfaces of the shell and. movable lengthwise thereof; a pair of laterallyT movable friction shoes within theA shell, each of said laterally movable shoes' including a substantially cylindrical spring cap and separate end shoes proper, each of the latter having an arcuate flange fitting the spring cap and the spring cap and said flanges extending within said'openings of the shellythe shoes proper having inclined` surfaces cooperable with said wedge-shoes; and spring means interposed between said laterally movable shoes. f

2. In a friction shock absorbing mechanism7 the combination with a casting having` a friction shell at each end thereof, said shell having interior friction surfaces extending lengthwise thereof and said casting being provided with opposed arcuate openings in its side walls; of a pair of yindependent combined friction shoesfand wedges cooperable with each friction shell, each of saidwedgeshoes having` an outer longitudinally extending friction surface and an inclined friction surface a-tits inner end; laterally movable friction` shoes within the casting, eachv laterally movable shoe, including a substantially cylindrical spring cap and separate end shoes proper, each of the latter having an arcuate flange conforming to the lspring cap,- n

said flanges and caps extending within said openings of the casting; and spring means interposed between said laterally movable friction shoes. v

3. In a friction shock absorbing mechanism, the combination with a casting havin g independent end shoes properand a spring cap, said shoes proper-and the caphaving portions thereof extending outwardly within said recesses, the cap and shoes proper having shouldered engagement ,withjeach' other yand spring means inter-posedb'etween said laterally movable friction shoes.

4L. In a friction shoclr absorbingmechavnism; the combination with a castingr having a frictionshell at each end thereof,` the jopposed side walls of said shell havingucentral openings therein; ofv a pair of independent combined able with each shell; laterally movable friction shoes within the. casting, each .ofsaid laterally movable shoes comprising a 'pair of independent end shoes-proper and a spring cap, said shoes proper and the cap having portions thereof extending outwardly within said recesses, the cap and shoes proper having shouldered engagement with each other; spring means interposed between said laterally movable friction shoesyand cooperating shoulders on' said wedge-shoes. and shells limiting the outward movement of the wedge-shoeslfwith respect tothe shells. In witness that I claim theforegoing I have hereunto subscribed name thislQtli' day ofApr., 1920, Y

y JOHN F. OCONNOR.

Witness: v

CARRIE' GAILING.

y a friction shell at each end thereofythe. opposed sidewalls of said shell .having cenfriction shoes and wedges cooper` 

